Digital Equipment Corporation
Maynard, Massachusetts
http://www.digital.com/semiconductor
DIGITAL Semiconductor 21140A
PCI Fast Ethernet LAN Controller
Data Sheet
Order Number:
ECQN7PFTE
Revision/Update Information
:
This is a revised document. It supersedes the
DIGITAL Semiconductor 21140A PCI Fast
Ethernet LAN Controller Data Sheet,
ECQN7PETE.
.
Hardware Version:
This document describes the 21140AD,
the 21140AE, and the 21140AF.
Important Notice
As of May 17, 1998, Digital Equipment Corporation's StrongARM, PCI Bridge, and Networking
component businesses, along with the chip fabrication facility in Hudson, Massachusetts, were
acquired by Intel Corporation and transferred to Intel Massachusetts, Inc. As a result of this
transaction, certain references to web sites, telephone numbers, and fax numbers have changed in the
documentation. This information will be updated in the next version of this manual. Copies of
documents that have an ordering number and are referenced in this document, or other Intel literature
may be obtained by calling 1-800-332-2717 or by visiting Intel's website for developers at:
http://developer.intel.com
The Intel Massachusetts Customer Technology Center continues to service your StrongARM Product,
Bridge Product, and Network Product technical inquiries. Please use the following information lines
for support:
For documentation and general information:
Intel Massachusetts Information Line
United States:
18003322717
Outside United States:
1303-675-2148
Electronic mail address:
techdoc@intel.com
For technical support:
Intel Massachusetts Customer Technology Center
Phone (U.S. and international):
19785687474
Fax:
19785686698
Electronic mail address:
techsup@intel.com
December 1997
While DIGITAL believes the information included in this publication is correct as of the date of publication, it is
subject to change without notice.
This data sheet, including associated product update information, defines a particular variant of this product. Please
read the Support, Products, and Documentation section in this document to determine how to obtain current product
update and errata information.
Digital Equipment Corporation makes no representations that the use of its products in the manner described in this
publication will not infringe on existing or future patent rights, nor do the descriptions contained in this publication
imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.
Digital Equipment Corporation 1997. All rights reserved.
Printed in U.S.A.
DIGITAL, DIGITAL Semiconductor, and the DIGITAL logo are trademarks of Digital Equipment Corporation.
DIGITAL Semiconductor is a Digital Equipment Corporation business.
IEEE is a registered trademark of The Institute of Electrical and Electronic Engineers, Inc.
MicroWire is a registered trademark of BankAmerica Corporation.
All other trademarks and registered trademarks are the property of their respective owners.
iii
Contents
1
21140A Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
1.3
Microarchitecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
2
Pinout
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
2.1
Signal Reference Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
2.2
Pin Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
2.3
Signal Grouping by Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
3
Electrical and Environmental Specifications
. . . . . . . . . . . . . . . . . .
22
3.1
Voltage Limit Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
3.2
Temperature Limit Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
3.3
Supply Current and Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
3.4
PCI Electrical Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
3.4.1
PCI I/O Voltage Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
3.4.2
PCI Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24
3.4.3
PCI Clock Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
3.4.4
Other PCI Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
3.5
Serial, MII/SYM, Boot ROM, Serial ROM, and
General-Purpose Port Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
3.6
Serial Network Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
3.6.1
Serial 10-Mb/s Timing--Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
3.6.2
Serial 10-Mb/s Timing--Collision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29
3.6.3
Serial 10 Mb/s Timing--Receive, Start of Packet . . . . . . . . . . . . . . . . . . . . .
30
3.6.4
Serial 10-Mb/s Timing--Receive, Start, and End of Packet . . . . . . . . . . . . .
31
3.7
MII/SYM Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
3.7.1
MII/SYM 10/100-Mb/s and 10-Mb/s Timing--Transmit . . . . . . . . . . . . . . . . .
32
3.7.2
MII/SYM 10/100-Mb/s Timing--Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
3.7.3
MII/SYM 10/100-Mb/s Timing--Signal Detect . . . . . . . . . . . . . . . . . . . . . . . .
35
3.7.4
MII/SYM 10/100-Mb/s Timing--Receive Error. . . . . . . . . . . . . . . . . . . . . . . .
36
3.7.5
MII/SYM 10/100-Mb/s Timing--Carrier Sense and Collision . . . . . . . . . . . . .
36
3.8
Boot ROM Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37
3.8.1
Boot ROM Read Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37
3.8.2
Boot ROM Write Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
38
3.9
Serial ROM Port Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39
3.10
External Register Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
40
3.11
Joint Test Action Group--Test Access Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
41
3.11.1
JTAG DC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
41
3.11.2
JTAG Boundary-Scan Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
41
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